Potted geraniums need a well-drained potting mix made for houseplants, according to the North Carolina Cooperative Extension Service. You can make your own mixture of equal parts sterilized garden soil, sand and peat.
About this Author
D.M. Cameron was a journalist and editor for wire services, newspapers and magazines for more than 20 years. In addition to editing and ghost-writing non-fiction books, Cameron now writes for several websites and trade journals. Cameron's degrees include a Bachelor of Arts in journalism from Penn State.